Mix contents of vegetable/seasoning packet, hot water, and butter in large bowl until butter is melted.
Stir in stuffing crumbs just to moisten. Let stand 5 min.
Place chicken down center of 12×8-inch baking dish.
Mix soup and sour cream; pour over chicken.
Spoon some of the stuffing over chicken. Spoon remaining stuffing along both sides of chicken.
Bake at 375 for 35 min. or until chicken is cooked through.
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